The world has seen two revolutions in power. Steam engines kicked off the first one in the late 1700s. They provided steady mechanical energy. Electricity brought about the second revolution in the late 1800s.
It created a wired world with countless gadgets to make life easier. Now a third revolution is brewing. Most of our electrical energy has come from burning fossil fuels such as coal and oil. But they create pollution. Also, they will run out one day. Can we improve our electric lifestyle while making it cleaner and more reliable?
